/*
* reserved comment block
* DO NOT REMOVE OR ALTER!
*/
package com.sun.org.apache.bcel.internal.classfile;
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*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
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*/
import java.io.*;
import com.sun.org.apache.bcel.internal.Constants;
/**
* Abstract super class for Fieldref and Methodref constants.
*
* @version $Id: ConstantCP.java,v 1.1.2.1 2005/07/31 23:46:28 jeffsuttor Exp $
* @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
* @see ConstantFieldref
* @see ConstantMethodref
* @see ConstantInterfaceMethodref
*/
public abstract class ConstantCP extends Constant {
/** References to the constants containing the class and the field signature
*/
protected int class_index, name_and_type_index;
/**
* Initialize from another object.
*/
public ConstantCP(ConstantCP c) {
this(c.getTag(), c.getClassIndex(), c.getNameAndTypeIndex());
}
/**
* Initialize instance from file data.
*
* @param tag Constant type tag
* @param file Input stream
* @throws IOException
*/
ConstantCP(byte tag, DataInputStream file) throws IOException
{
this(tag, file.readUnsignedShort(), file.readUnsignedShort());
}
/**
* @param class_index Reference to the class containing the field
* @param name_and_type_index and the field signature
*/
protected ConstantCP(byte tag, int class_index,
int name_and_type_index) {
super(tag);
this.class_index = class_index;
this.name_and_type_index = name_and_type_index;
}
/**
* Dump constant field reference to file stream in binary format.
*
* @param file Output file stream
* @throws IOException
*/
public final void dump(DataOutputStream file) throws IOException
{
file.writeByte(tag);
file.writeShort(class_index);
file.writeShort(name_and_type_index);
}
/**
* @return Reference (index) to class this field or method belongs to.
*/
public final int getClassIndex() { return class_index; }
/**
* @return Reference (index) to signature of the field.
*/
public final int getNameAndTypeIndex() { return name_and_type_index; }
/**
* @param class_index points to Constant_class
*/
public final void setClassIndex(int class_index) {
this.class_index = class_index;
}
/**
* @return Class this field belongs to.
*/
public String getClass(ConstantPool cp) {
return cp.constantToString(class_index, Constants.CONSTANT_Class);
}
/**
* @param name_and_type_index points to Constant_NameAndType
*/
public final void setNameAndTypeIndex(int name_and_type_index) {
this.name_and_type_index = name_and_type_index;
}
/**
* @return String representation.
*/
public final String toString() {
return super.toString() + "(class_index = " + class_index +
", name_and_type_index = " + name_and_type_index + ")";
}
}